Procedures:
1. Heat 1 tablespoon oil in a large skillet over medium - high heat until smoking. Add bratwurst and cook until browned on all sides, about 5 minutes add the chicken broth, reduce heat to medium - low, cover and cook until the sausages are not pink in the center, about 10 minutes. Remove the lid, increase the heat to medium - high and simmer until the liquid has thickened slightly, about 1 minute. Transfer sausage plate and whisk the mustard and 1 tablespoon honey in the sauce. Pour the sauce over the sausage.
2. Meanwhile, beat remaining 3 tablespoons honey, vinegar, remaining 2 tablespoons oil and celery seeds in a large bowl. Mix cabbage and onions in dressing and season with salt and pepper. Serve with sausage.